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Observations

Region: Summit
Location: Road Observations - Butch and Fresno
Observer:
Date:

Route & General Observations

A quick drive through Summit Lake revealed two new natural avalanches sometime on April 1st or 2nd.

The first avalanche was a storm slab on Fresno (Easterly facing at ~3,000′). This looks to have stepped down into old weak layers (possibly depth hoar which is prevalent in the area). Propagation was not significant with this slide.

The second slab avalanche was on Butch Mtn (Westerly facing at ~4,000′). Roughly a 2′ crown with significant propagation. This slide looks to have been triggered by a cornice fall then sympathetically triggered a slab on a lower sub-ridge (looker’s right). Look closely at photos below.

Avalanche Details

Avalanche details

Trigger NaturalAvalanche Type Hard SlabAspect Unknown
ElevationunknownSlope AngleunknownCrown Depthunknown
WidthunknownLengthunknown  

Observer Comments

Details above.

Red Flags

Obvious signs of instability

Recent Avalanches?YesCollapsing (Whumphing)?NoCracking (Shooting cracks)?No

Observer Comments

Recent avalanches continue despite quieter weather.

Photos & Video

Photos



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